va_arg

type va_arg ( va_list ap, type )

Retrieve next argument

Parameters

ap

Object of type va_list with information about the additional arguments an their retrieval state. This object shall have been initialized by an initial call to va_start before the first call to va_arg.

type

A type name. This type name is used as the type of the expression this macro expands to (i.e., its return type).
For a type expression to be suitable for its use with va_arg it must be such that when an asterisk (*) would be appended to its right the resulting expression would be a valid pointer type to a type object.

Return Value

Example

/* va_arg example */
#include <stdio.h>
#include <stdarg.h>
int FindMax ( int amount, ...)
{
  int i,val,greater;
  va_list vl;
  va_start(vl,amount);
  greater=va_arg(vl,int);
  for (i=1;i<amount;i++)
  {
    val=va_arg(vl,int);
    greater=(greater>val)?greater:val;
  }
  va_end(vl);
  return greater;
}
int main ()
{
  int m;
  m= FindMax (7,702,422,631,834,892,104,772);
  printf ("The greatest one is: %d\n",m);
  return 0;
}

See also